[Bungleau]

The thieves' guild quests in Brimloch Roon are messed up, and worse than the wizards' guild quests.

You get the first quest with no problem. That's the hook.

You then get the second quest for the leprechaun's stone.

If you complete that, you do not get the third quest (for Talon's Fang). You get caught in that endless reward loop.

So the common workaround is for one character to complete the second quest, and for everyone else to skip it. They can then complete the third quest. The poor schlub who took the second quest never gets a chance for the third quest, but it's okay; they get the perpetual reward thing.

And the fang is a treasure from the Mother of Crabs, IIRC. She is in Collasium.